Heat reducing cigarette filter



Sept. 5, 1961 w. A. SNOWDEN, JR 2,998,819

HEAT REDUCING CIGARETTE FILTER Filed June 2, 1958 Fig. Fig. 2 Fig. 5Fig. 6

INVENTOR .Wil/iam A Snowden Jr.

ATTORNEY} United States Pat i 9t 2,998,819 HEAT REDUCING CIGARETTEFILTER William A. Snowden, Jr., 3216 Lakeshore Drive W.,

Tallahassee, Fla. Filed June 2,-1958, Ser. No. 739,135 2 Claims. (Cl.131-10) This invention relates to improvements in cigarettes.

The primary object of this invention is the provision of improved meansembodied in a cigarette construction for the purpose of reducing thetemperature of the smoke in order to permit proper condensation andfiltering of harmful tars, oils, nicotine and other ingredients in. aneflicient manner.

A further object of this invention is the provision of an improvedcigarette construction embodying the usual tobacco filled paper bodyportion of the cigarette and an absorbent filter construction at themouth tip of the cigarette, with an improved cooling means located between the filter and the body portion of the cigarette for conveying theheat of passing smoke to a location externally of the cigarette wherebyto permit efiicient removal of the harmful ingredients in the smoke, asit passes through a cooling compartment and through the filterconstruction.

Other objects and advantages of this invention will be apparent duringthe course of the following detailed description.

In the accompanying drawing, forming a part of this specification, andwherein similar reference characters designate corresponding partsthroughout the several views.

(FIG. 1 is a fragmentary vertical cross sectional view taken through oneform of the improved cigarette.

FIG. 2 is a fragmentary side elevation of the cigarette shown in FIG. 1.

FIG. 3 is a transverse cross sectional view taken substantially on theline 3-3 of FIG. 2.

FIG. 4 is a perspective view of the improved cooler used in thecigarette of FIG. 1.

FIG. 5 is a vertical fragmentary cross sectional view taken through asomewhat modified form of cigarette, showing a different form of coolerassembly.

FIG. 6 is a fragmentary side elevation of the cigarette shown in FIG. 5.

FIG. 7 is a transverse cross sectional view taken substantially on theline 7--7 of FIG. '6, through the cooler assembly of the cigarette shownin that view.

In the drawing, wherein for the purpose of illustration are showndiflerent forms of the invention, the letter A may generally designate apreferred form, as shown in 'FIGS. 1 to 4 inclusive, and B a modifiedform of cigarette as shown in FIGS. 5, 6 and 7.

Referring to the form of invention A, the numeral 10 may designate thebody portion of the cigarette, including tobacco 11, and the usual papercasing or cylinder 12. The cigarette A furthermore includes a filter 13,comprising a preferably stifi paper or cardboard cylinder 14,

the passageway of which is filled with filter material of any approvedtype, adapted to filter the harmful ingredients from the tobacco smokeas it passes therethrough. The cigarette A furthermore includes acooling assembly 16, comprising a preferably somewhat stiff paper orcardboard cylinder 17, which is connected and assembled between the bodyportion of the cigarette and the filter. One method of such assemblageis to insert the ends of the cylinder 17 into the paper cylinders formedby the cigarette body 10 and the filter 13; any suitable adhesive beingused, if found desirable, to secure the cooler cylinder 17 in suchposition. The chamber 20 of the cylinder 17 is entirely unobstructed,with the exception of a heat conductor 21, shown best in per spective inFIG. 4, and which preferably consists of vanes 22 radially extended fromthe axis thereof and at their outer ends each having an arcuate orsegmental portion 23 which overlies the external surface of the cylinder17; the latter being provided with slots 24 therein to permit thesegments of the conductor to lie externally of the cardboard cylinder17, as shown in FIG. 3, of the drawing. The heat conducting material mayvary, but preferably will be thin metal foil, either flexible or semirigid. The only material disposed in the compartment 20 of the coolercylinder 17 consists of the vanes 22, which are provided in any desirednumber, but with sufiicient spaces therebetween to permit the smoke topass therethrough and be cooled, through transmition of the hightemperature from the smoke, to the vanes and to the external segments23. Thus, the smoke is cooled prior to entering the filter. Thisreduction in temperature permits efficient condensing and trapping ofthe harmful ingredients of the smoke in the filter.

Referring to the form of cigarette B, the same reference numerals havebeen given to the tobacco supporting body of this cigarette B and to thefilter as has been given in the form of invention A, but the coolerconstruction 30 is of different formation. It has a cylinder 31 which isassembled in the same manner as described for the form of invention A,in the ends of the body paper of cylinder 12 and the filter cylinder 14.However, the metal foil or other heat conducting material 32 is spirallydisposed in the passageway 33 of the cylinder 31, extending from theaxis of said cylinder and 31 spiralling outwardly with increasing size.The various oonvolutions do not contact each other, and are disposed inthe compartment 33 in relatively spaced relation. The spiral portion ofthe metal foil 32 passes through a slot 35 in the cylinder 3-1, as shownin FIG. 7, and then is applied externally (by an adhesive if founddesirable) and circumferentially about the cylinder 31, forsubstantially the entire circumference of the cylinder 31. It thus formsa cylinder 36 which enables the heat to be transmitted from the spiralconvolutions and dissipated externally of the cigarette.

In both forms of invention the smoke together with any harmfulingredients entrained therein are first drawn into the coolingcompartment. The heat of the smoke is transmitted by the metal foil tothe exterior of the cigarette, and by the time the smoke reaches thefilter it is relatively cool, enabling proper absorption of the harmfulingredients of the smoke in the filter.

It is within contemplation of the invention to provide other coolingmeans in the cigarette then that described; one of the most importantfeatures of the assembly being the fact that the smoke can freely passthrough the cooling compartment where the same is cooled throughtransmission of the heat to a location externally of the cigarette priorto the smoke passing into the filter body.

Various changes in and to the size, shape and arrangement of parts ofthe invention may be made without departing from the spirit of theinvention or the scope of the claims.

I claim:

1. A cigarette comprising a cylindrical shaped elongated casingstructure of tubular formation having a lower portion thereof providedwith smoking tobacco packed therein and having an upper portion providedwith a filter disposed in the casing structure in spaced relation fromthe packed smoking tobacco to provide a chamber between the smokingtobacco and the filter, and quick heat transfer material mounted in saidchamber and which material consists of metal foil in the form ofrelatively spaced vanes extending laterally and longimdinally in thechamber to permit free flow of smoke through the spaces between saidvanes from the tobacco portion to the filter, said casing structurehaving lateral openings therethrough from said chamber and opening tothe exterior of the cigarette and said vanes of metal foil extendingthrough said openings and being exposed to the atmosphere externallyaround the casing structure for the purpose of dissipating heat from thecigarette to the atmosphere below the filter.

2. As an article of manufacture, a cooler for use on cigarette endscomprising a supporting cylinder adapted to be connected to a cigaretteand having a passageway therethrough and having lateral slots opening tosaid passageway, and heat transfer metal foil disposed in saidpassageway and comprising a plurality of relative 1y spaced vanesextending from the axis of the cylinder and disposed transversely of thecylinder through slots in the cyiinder and externally upon the cylinderhaving exposed heat conducting segments.

References Cited in the file of this patent UNITED STATES PATENTS205,345 Bovee June 25, 1878 1,183,339 Brinton May 16, 1916 1,605,059Oakes et al. Nov. 2, 1926 1,969,834 Bcrriman Aug. 14, 1934 2,216,303Taylor Oct. 1, 1940 2,445,476 Folkman July 20, 1948 2,669,995 Troy Feb.23, 1954 2,728,346 Crawford Dec. 27, 1955 15 2,827,903 Niederman Mar.25, 1958 FOREIGN PATENTS 238,091

Germany Sept. 16, 1911

